NEW YORK — Adobe says it is moving to an online subscription-based model for the software package it sells to designers, Web developers, video editors, and other creative professionals.

Adobe Systems Inc. said Monday that it will not release new versions of its Creative Suite software package. Instead, the maker of Photoshop, Illustrator, and Acrobat is shifting focus to Creative Cloud, which makes its software available through a monthly subscription that starts at $50 for an individual if they sign up for at least a year.

Adobe’s move is part an industry trend toward selling software as a subscription service rather than as a one-time sale item. Microsoft Corp., for example, makes the new version of Office available as an online subscription. The company, however, still gives consumers and businesses the option of purchasing Office as packaged software.

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‘‘Customers have to come to terms with end of perpetually licensed software,’’ said IDC analyst Al Hilwa.